地铁浅埋暗挖法施工引起的地表沉降控制标准的统计分析

由于在地铁施工过程中不可避免地会对地层产生扰动，就必然产生不同程度的地面沉降，从而对地铁施工及周边环境的安全性产生不利的影响，例如对城市的道路、桥梁、地下管线和地面建构筑物等的安全性产生不利的影响。因此，科学合理地确定地表沉降控制指标，以减轻、消除和避免由于地表沉降产生的不利影响，是十分必要的。通过对众多工程实例的实地调研，并综合运用模糊聚类分析方法对实地调研数据进行统计分析，同时考虑工程建设的经济性，给出在目前工程条件下地表沉降控制值的建议值，这对指导地铁工程的施工有十分重要的意义。

STATISTIC ANALYSIS OF GUIDEPOSTS FOR GROUND SETTLEMENT INDUCED BY SHALLOW TUNNEL CONSTRUCTION

Because tunnel construction inevitably disturbs stratum, ground settlement with different degree is generated resulting in unfavorable effect on safety of subway construction and surrounding environment, such as roads, bridges, underground pipelines and ground buildings in urban districts. So it is necessary to define guideposts of ground settlement scientifically to reduce or avoid unfavorable effect caused by ground settlement. Based on many in-situ investigations of projects, statistic analysis for measured data with fuzzy cluster analysis, and consideration of economy of engineering construction, the method and controlling value for defining ground settlement guideposts are given, which is important to guide tunnel construction.